Longman Dictionary of Contemporary English - sickness

~ n 1 the state of being ill; illness  (an insurance policy against long-term sickness and injury | working days lost due to sickness) 2 the feeling that you are about to bring up food from your stomach; nausea  (A wave of sickness came over him. | morning sickness (=sickness that some women get when they are going to have a baby) | travel/car/sea/air sickness (=sickness that some people get while travelling)) 3 a particular illness  (They died within a few days of each other, probably from a sickness like the plague.) 4 the serious problems and weaknesses of a social, political, or economic system  (He said the idea of `success' was part of the sickness of Western cultures.)